Dynamic tomography system and method for fully mechanized face near field coal rock under exploiting excitation of coal machine

Abstract

The invention discloses a dynamic tomography system and method for a fully mechanized face near field coal rock under exploiting excitation of coal machine. The system comprises an array information synchronous acquisition device and a near-field coal rock tomography working station; the near-field coal rock tomography working station is connected to the array information synchronous acquisition device. The excitation source for vibration is a coal machine. The array information synchronous acquisition device comprises an exploiting position detection unit and two anchor rod vibration detection arrays that are uniformly arranged in a mining roadway. The system is simple in structure and reasonable in design. The system is also convenient to install and operate and is good in using effect. Taking a coal machine as an excitation source, the system makes good images. The invention further discloses a dynamic tomography method for a coal rock near a fully mechanized face under exploiting excitation of a coal machine; the method comprises following steps: 1) the anchor rod vibration detection units and the exploiting position detection units are deployed; 2) dynamic tomography for a coal rock near a fully mechanized face is done under an exploiting excitation of a coal machine. Such a method can be done with a few steps. Reasonably designed, the method can also be done very conveniently to provide dynamic chromatography imaging conveniently and quickly.

Description

technical field [0001] The invention belongs to the technical field of dynamic monitoring of coal and rock near a fully mechanized mining face, and in particular relates to a coal and rock dynamic tomographic imaging system and method in the near field of a fully mechanized mining face under the excitation of a coal machine. Background technique [0002] According to the safety production regulations of coal mining enterprises (that is, "Coal Mine Safety Regulations"), before production, technical means such as drilling, geophysical prospecting and roadway exploration should be used to detect the geological structure, hydrogeology, environment, coal, rock formations and other relevant geological conditions, prevent gas outburst and water inrush accidents, and ensure safe production. However, with the increase of coal mining depth and mining scale in my country in the past ten years, the mining conditions have become more complex; and the traditional advanced detection method...

AI Technical Summary

Problems solved by technology

However, the above-mentioned existing detection methods must carry out special detection construction under the condition that the fully mechanized mining face is shut down / quasi shut down.

It is impossible to dynamically measure the damage and crack evolution of the near-field coal and rock structure of the fully-mechanized mining face in the working state, so it cannot provide effective help for the dynamic prediction and early warning of coal mine safety

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